1e LiPoTx Operating instructions
Contents
1. te wee IVE ce rx operating instructions Transmitter battery LiPoTx Operating instructions Transmitter battery LiPoTx Operating instructions Transmitter battery t RoT Operating Instructions Tranemitec sane M Issue 02 08 Page 2 1 Introduction It s hardly comforting when you notice that the capacity of your transmitter battery is clearly declining and its self discharge rate is so high in any case The LiPoTx is the answer as it is a replacement pack which fits in the existing battery compartment of many transmitters e Integral balancer works while the pack is on charge e Integral safety circuits to ensure as far as possible that the battery and the transmit ter cannot be damaged by incorrect charging e g if a NiCd program is used e Simulation of declining Ni Cd battery voltage to provide compatibility with existing battery state indicators only required for LiPoTx gra 2 1 Installation notes for the Graupner mc 10 mc 24 Fit the pack into the battery compartment between the rubber bands with the cable on the left and the circuit board type sticker inverted fitting exactly in the battery compartment depression the flat face of the battery should be up facing the transmitter back cover 2 2 Installation notes for the MPX 3010 3030 4000 Unfortunately it is necessary to modify the battery compartment slightly in order to accommodate the 3200 mAh pack two of the vertical ribs in the well must2. the charger If a nearly full battery is connected to the charger the charger might detect over oltage wrong cell count or similar This is normal and caused by a voltage increasing diode path which is not short circuited in the first moment of charging 5 Special features protective circuitry We have employed a little trick with the three cell Graupner battery pack to ensure that the transmitter meter indicates the state of the LiPo pack in a similar way to a conventio nal Nickel battery the pack feeds a declining voltage to the transmitter starting when approximately half its capacity is discharged mimicking the voltage curve of a Nickel battery This gives the pilot plenty of warning that the battery is nearing the end of its useful capacity The battery state indicator for the two cell MPX transmitter battery is not specially modified 5 1 Inadvertently charging the battery using a NiCd or NiMH battery charge program 5 1 1 Charging at currents up to 2 A towards the end of the charge process the battery will be fed an excess voltage of around 0 1 Volt The battery is then disconnected from the charger and the charger s output is short circuited to earth by the LiPoTx via three diodes At this point any Schulze charger will emit a low voltage warning or display a message indicating that the battery should be disconnected The short circuit is removed again as soon as the charge current falls to zero Note that the
3. Weight 271 grammes limited by the connecting lead the circuit board tracks and the connector Instructions Page 3 Issue 03 06 Wh gt LiPoPerfekt battery pack important hints LiPoPerfekt battery pack Important hints LiPoPerfekt battery pack Important hints gt JEP OP erent atten peck Imponant hints aan ag Common hints on using Lithium batteries Read the charging discharging conditions of the battery as well as the instructions in the supplementary handling precautions carefully and observe them at all times e Do not disassemble modify heat or short circuit the battery e Do not burn the battery or store it in a hot area Do not drop the battery and or apply excessive mechanical stress to it e Do not allow the battery to get wet e Use for charging only the LiPoCard resp a charger in conjunction with the LiPo Balancer and its activated safety circuit circuits e During discharging use suited additional Schulze devices to protect the battery We recommend the LiPoBalancer for test series and in your model the LiPoDiIMATIC Otherwise the lifetime of the battery can be rapidly reduced 1 Charging instructions e Lithium batteries must not be charged and or operated in any combination with primary cells dry cells or other types of rechargeable battery Nickel Lead acid batteries or other types of Lithium cells e g Li lo with Li Po with cells of different capacity and or make and with
4. battery will generally not be completely fully charged at this point since the voltage declines when the charge current is cut off 5 1 2 Charging at currents above 2 5 A the LiPoTx detects excess current and the battery is then disconnected from the charger as under 5 1 1 The charger s output is short circuited to earth by the LiPoTx via three diodes The short circuit condition may generate a variety of error messages on Schulze chargers but in all cases the result should be to cut off the charge current 5 2 Short circuiting the charge lead Discharge currents above about 1 4 A the LiPoTx switches off the output voltage and waits until the unacceptable load or short circuit is removed 6 Specifications LiPoTx 2000 mpx 2 Zellen 2 0 Ah 2s 1p 2000 7 4 V Replaces 7 2 V Nickel Packs Max charge voltage max charge current 8 4 volts 2 amperes Size 82 42 22 mm Weight 116 grammes LiPoTx 3200 mpx 2 Zellen 3 2 Ah 2s 1p 3200 7 4 V Replaces 7 2 V Nickel Packs Max charge voltage max charge current 8 4 volts 2 amperes Size 135 42 20 mm Weight 184 grammes LiPoTx 2000 graupner 3 Zellen 2 0 Ah 8s 1p 2000 11 1 V Repl 9 6 V Nickel Packs Max charge voltage max charge current 12 6 volts 2 amperes Size 82 42 30 mm Weight 166 grammes LiPoTx 3200 graupner 3 Zellen 3 2 Ah 8s 1p 3200 11 1 V Repl 9 6 V Nickel Packs Max charge voltage max charge current 12 6 volts 2 amperes Size 135 42 29mm
5. be removed using side cutters a cut off disc or a similar tool Place the battery in the battery compartment with the cable on the right and the circuit board type sticker facing up at the left Pack foam rubber or similar round the battery inside the compartment to ensure that it cannot shift 3 The battery in use Locate the lead attached to the battery and insert the plug in the socket to which the previous battery pack was connected This automatically ensures that the pack can be charged in the usual way via the transmitter s standard charge socket and that energy is fed to the transmitter through this cable when it is switched on This means you do not have to make any changes at all when using the transmitter 4 Charging technique As mentioned above the charge lead should be inserted into the standard charge socket on the transmitter i e the battery can be charged in the usual manner when the transmit ter is switched off The only point to remember is that you should use a special Lithium battery charger This should be set up in such a way that the charge current does not exceed the maximum permitted rate stated in the transmitter operating instructions nor the maximum charge current printed on the battery or in the Specification at the end of these instructions The lower of the two values must be observed Hint Refresh or Reflex charging must be switched off Be sure to set the battery specific cell count on
6. cells of different maximum load capacity e Lithium batteries must not be charged using any charger or charge program which was intended for Nickel batteries Ni Cd or NiMH These batteries must only be charged using a specialised unit such as the Schulze LiPoCard or a charger such as the Schulze isl 6 nextGeneration or isl 8 series these devices include programs for charging Lithium batteries FIRE HAZARD if you do not observe the battery manufacturer s charging instructions you risk damag ing and even ruining the batteries swelling explosion this can result in fire In particular please remember that the number of cells in the pack must be set correctly on the charger note this applies only to the number of cells wired in series Parallel wired cells are seen by the charger simply as one 1 cell of large capacity e Before charging the cells it is essential to check the cell count setting and the maximum charge voltage on the charger e Before charging the cells it is essential to check the maximum charge current setting e Keep the battery well away from inflammable materials and volatile gases e During any charge discharge process the balancer the charger discharger and the connected batteries must be placed on a non inflammable heat resistant and electrically non conductive surface Such surfaces include ceramic dishes and flower pots and special fireproof plastic or aluminium cases these must be insulated e
7. ch personal injury or property damage result 3 Cell handling The voltage of brand new cells and discharged cells is not zero it is generally more than 3 Volts Short circuit hazard e Never place cells or batteries on a conductive surface Note that carbon fibre fuselages and carbon fibre spars are conductive Do not place batteries in a micro wave oven e Schulze LiPoPerfekt battery packs are protected at many points against accidental short circuit using cover plates silicone fabric tape and heat shrink sleeving Take care to avoid short circuits at any unprotected points and keep an eye open for abraded areas of the heat shrink sleeving if you discover a weak point insulate it thoroughly e Keep individual cells and battery packs well away from youngsters and store them out of the reach of children at all times Many cells look rather like chewing gum or chocolate bars and this is potentially confusing and dangerous Do not open cells The internal chemicals react with oxygen in the air and or water and in some circumstances the reaction can be violent If a cell should catch fire and you have no suitable extinguish ing agent to hand sand extinguisher powder allow it to burn out taking care not to breathe in the vapours generated by the fire If the chemicals make contact with your eyes immediately wash it off using plenty of water and seek the assistance of a specialist doctor e The manufacturer s stated max
8. g using plaster sheets e Don t charge batteries in the car the seats burn very well e Supervise the charge process constantly if the battery swells up disconnect it from the charger immediately Burning batteries should be extinguished with dry sand or a powder fire extinguisher never with water explosion hazard e Never attempt to recharge dead or damaged cells this can have particularly disastrous results if these cells are part of a pack which also includes healthy cells e Protect the cells from mechanical loads Observe the charge current and discharge current limits stated by the battery manufacturer Do not exceed the maximum values as this brings a risk of drastic reduction in the pack s useful life e Contrary to much published information the professional protective circuit for Kokam cells defines the lower and upper limits as 1 0 and 4 5 Volts per cell http www kokam com english biz care html e The most common cause of unbalanced battery packs is not deep discharging to below 3 V cell but overloading through excessive discharge currents e Be cautious with dealers statements such as maximum load currents of 15C or 20C often this refers to peak load values and not continuous currents e Lithium cells lose a small amount of capacity every time they are charged but the loss is much higher if they are overloaded e Make sure your batteries are protected from short circui
9. imum discharge rates may be greatly exceeded when the cells are in use typical of RC usage which means that the cells are working under experimental conditions As a result the manufacturer the importer and the dealer are not liable for any claim under guarantee in respect of capacity useful life storage and discharge characteristics 4 Disposal e Discharge the cells slowly ideally using a 1 10 kOhm resistor which you can leave attached to the empty cells e Take the dead discharged cells to your local battery collection point packs purchased from us can also be returned to us Schulze Elektronik GmbH Prenzlauer Weg 6 64331 Weiterstadt e Fon 49 6150 1306 5 Fax 1306 99 www schulze elektronik gmbh com e Germany hotline schulze elektronik gmbh com
10. t at all times Whether the short is caused by a screwdriver in your toolbox or by a house key in your trouser pocket the result is the same overloaded cells and possibly a fire If you deep discharge a battery at a high current to a point below 1 V cell the result is invariably irreparable damage In any application where high motor currents are used the discharge limit for packs of identical cells must be in the range 2 4 3 0 V cell If the pack includes cells in different conditions the discharge limit should be set even higher to avoid the danger that the weakest cell might fall below the critical 1 V point when being discharged Our own experience shows that deep discharges are not so critical if they are caused by the idle currents of electronic circuits speed controller not disconnected from the flight battery after the flight balancer powered by the battery and not removed after discharging the pack However if you discover a battery in this condition charge it initially using a very low current 1 20C or less until it reaches a voltage within the working window of the cells for Li Po cells that is 3 0 4 2 Volts e Since we are not in a position to ensure the proper use of the cells the user is deemed to have accepted the responsibility once he opens the sales package Thereafter he has no claim against the manufacturer the importer the dealer or the employees of those companies if an accident occurs in whi
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